NAYFH PT secondary load on - line testing device
Also called name
NAYFH type PT secondary pressure drop load online test device, PT secondary pressure drop load tester, pressure drop load tester, PT secondary pressure drop load online detection device, secondary pressure drop load test device, online PT secondary pressure Load reduction detection device, secondary pressure drop load online detector, three-phase four-wire pressure drop load tester, secondary pressure drop load detection device

Main Features
⑴ to achieve three-phase three-wire, three-phase four-wire, single-phase automatic measurement;
⑵ use of engineering plastic chassis, get to know durable, effective protection of test personnel and system security;
⑶ instrument has a range of automatic switching function to ensure that the test accuracy;
⑷ the use of electronic principles of the line with DSP technology is to make the test stability, anti-interference ability;
⑸ measurement is completed, the automatic calculation and load-related parameters, to facilitate customer analysis and testing.
⑹ using large-screen LCD display in English, all operations by the Chinese and English menu prompts; data with power-down storage and browsing capabilities, can send data with the computer on-line.
⑺ 7.2V11Ah lithium battery with high-capacity power supply, the test circuit does not have any effect, to avoid the system appears to protect the situation. While in the field without power supply in the case of use.
⑻ second load test, using clamp-type ammeter sampling current, do not disconnect the secondary circuit. Can achieve non-blackout on-line measurement. Automatic switching range: the measurement process can be different according to the test object to switch to a different location, so that measurement accuracy and display digits are guaranteed.
⑼ working hours can be up to 24 hours (the longest).
⑽ with a lightweight charger to facilitate measurement, in the case of battery power can be an external charger measurements.
⑾ equipment, small size, light weight.
⑿ wide secondary operating current / voltage range. In the 50mA operating current, can distinguish 1mΩ resistance and reactance, can test the secondary rated current of 5A S-class current transformer on-line actual load; 5V operating voltage, can distinguish between 0.001mS conductance and susceptance .
⒀ can store 480 sets of measurement data, power can be maintained for ten years.
⒁ Chinese and English interface large screen display, with RS-232 communication interface.

Main Specifications
1. Environmental conditions
1). Temperature: -5C ~ 40C
2). Relative humidity: <95% (25C)
3). Altitude: <2500m
4). External interference: no special strong vibration, no special strong electromagnetic field
2. Secondary pressure drop test equipment, the main technical indicators
1) Measuring range: difference: 0.001% to 19.99% Angle difference: 0.01 'to 599'
2) Resolution: Difference: 0.001% Angle difference: 0.01 '
3) Basic error of the instrument
 - X = (1% X + 1% Y2 words);
 - Y = (1% X + 1% Y2 words).
 2 words - quantization error of the instrument
4). Voltage meter accuracy: 0.5%
Scope of Work Voltage: (50 to 120) V
6). Instrument indicates the action value (prompt error)
 - Error: the difference is greater than 20% or the difference is greater than 600 '.
 - Voltage: Voltage <2.0V.
3. PT secondary load test equipment, the main technical indicators
1). PT secondary load test
 - Admittance measurement range: 0.1ms-50.0ms
 - Admittance Measurement Accuracy:
 - Secondary voltage (50V-120V)
 X = (1% X + 1% Y2 words)
 Y = (1% X + 1% Y2 words)
 2 words - quantization error of the instrument
Note: When the measured value is less than 0.2mS, the test voltage should be kept above 50V, and pay attention to the centripetal wire of the clamp. At this point the instrument quantization error of 5 words
2). Voltage meter head: 0.5%
4. CT secondary load test equipment, the main technical indicators
 - Impedance measurement range: 0.1Ω-50.0Ω
 - Impedance measurement accuracy:
 X = (1% X + 1% Y2 words)
 Y = (1% X + 1% Y2 words)
 2 words - quantization error of the instrument
 Current meter head: 1%